movies = []


class Movie(object):
    def __init__(self, name, sample_attr):
        self.name = name
        self.sample_attr = sample_attr
        movies.append(self)


def create(name, sample_attr):
    return Movie(name, sample_attr)


def update(name, set_sample_attr):
    matches = [m for m in movies if m.name == name]
    if len(matches) != 1:
        raise LookupError(f"{matches}/{name} should be of length 1")

    matches[0].sample_attr = set_sample_attr

    return matches[0]


def _clear_movies():
    while movies:
        movies.pop()